A blaze at a North Philadelphia housing complex was put out quickly without any injury, police on the scene said last night.

The fire broke out about 8:30 p.m. on the 16th floor of a Public Housing Authority building on 11th near Cumberland, police said. Approximately 160 housing units were damaged in the fire, which was believed to have been started by a burning mattress.

Fire crews on the scene were seen evacuating residents, who will be relocated in the coming days by the Office of Emergency Management.

Authorities said the power was shut off in the building, the result of a burst water pipe in the basement.

The exact cause of the fire is under investigation.